Writing a Client-Side RSS Reader

A few months ago, after getting frustrated with a few popular RSS readers online, I decided I could create my own RSS reader (as you do).
My main points of frustration were that; these tools were either completely paywalled, had free tiers that would beg you to get the premium at every chance, or were a pain to operate.
I wanted something that would just get the job done: show me posts from feeds I follow. Give me a clean UI to go through them, be completely free to run and use, and not have any unnecessary distractions.
A couple weeks later, someone asked if anyone knew of a good RSS reader in a whatsapp group I was part of. And I thought I could come up with something really quickly.

